On 2020-05-26 20:16, Thomas Huth wrote:
On 18/05/2020 18.07, Pierre Morel wrote:
use get_clock_ms() to calculate a delay in ms
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
lib/s390x/asm/time.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/lib/s390x/asm/time.h b/lib/s390x/asm/time.h
index 25c7a3c..931a119 100644
--- a/lib/s390x/asm/time.h
+++ b/lib/s390x/asm/time.h
@@ -23,4 +23,14 @@ static inline uint64_t get_clock_ms(void)
return (clk >> (63 - 51)) / 1000;
}
+static inline void mdelay(unsigned long ms)
+{
+ unsigned long startclk;
+
+ startclk = get_clock_ms();
+ for (;;)
+ if (get_clock_ms() - startclk > ms)
+ break;
Maybe rather:
for (;get_clock_ms() - startclk <= ms;)
;
?
Or:
while (get_clock_ms() - startclk <= ms)
;
?
Thomas
Hi,
your comment made me realize I did not take care on the wrapping.
I will rework this.
Thanks,
Pierre
--
Pierre Morel
IBM Lab Boeblingen
